US1848369A - Plug valve - Google Patents

Description

' Marcb8,1932. P W.W.IMOHR I 1,848,369 7 ed Oct 2 1930 March 8, 1932. w. w. MOHR 1,848,369

PLUG VALVE Filed Oct. 20, 1930 5 Sheets-Sheet 3 v Jr I Z- Z7%.4 f P E/VTO 7 W41. T/ZEW/VOH/Q I a0 a5 m/M M ATTORNEY.

Patented Mar. 8, 1932 i UNITED STATES PATENT OFFICE WALTER w. norm, or cinema, rumoxs, ASSIGNOR TO THE EDWARD VALVE 4m) MANUFACTURING country, or EAST cmoAeo, INDIANA, A CORPORATION or ILLINOIS PLUG VALVE V Application filed October 20, 1930." Serial No. 489,783;

My invention relates to an improved conits open position, this view being taken longi- V struction of plug valve for controlling high tudrnallyof the flow path through the valve,

" quired to seat and unseat the valve in conneo- Fl.

fluid pressures where special means are re- 1g. 3 1s a top View of the parts shownjn 1 tion with opening and closing it. ig. 4 is a vertical, central, sectional View By in invention, I providea construction to an enlarged scale of the handle mechanism by which an operating handle is mounted on and associated parts, these parts being shown a member movable angularly independently in Fig. 1 in front elevation, and of the valve stem, the member being carried ig. 5 is a view similar to Fig. 2 with the by a yoke to raise or lower the valve stem, devalve member in its closed position. o pending upon the direction of movement of Similar numerals refer to similar parts the handle,to unseat orseat the plug valve throughout the several views. member as desired. The valve stem is prosshown in Fig. 1 my plug valve construcvided wit an operating arm for engagement tlon consists o: f a body 10, which, as shown in with the handle mechanism, the handle mech- F 1g. 2, 1S PIOVlClGd With fluld inlet and outlet e amsm consistin of memb r movabl relaconnections 11 and 12 between which atapered tively to each 0t er and carrying lugs for seore l3 is' formed in the body to receive with lective engagement with the stem arm, so that a l se fit the slmllarly tapered plug valve yproper operation of the handle, its continumember 14. Above Its seat, the valve mem- 'ous angu ar movement in one direction will 1 is of reduced diameter toconstitute a first unseat the phi .valve member and then valve stem 15. which extends upwardly to th move the valve mem er angularly from one of top of the valve structure where said valve seat, and that by continuous angular moveatlng arm'18 and an indicating extension 19. ment of: the handle mechanism in the other W h 0113 7, h valve stem carries a the alve ,member is moved from washer 20 and the 00118.! 17 is pressed tightly one of its flow controlling positions to the agamstthewasher and the latter is in tu n so other with the valve member free. fromits held g y g p t h l r at the end of J seat, and thereafter the valve member is the squared portwn of the valve m, y a

.mQVe'd into engagement its seat, castellated nut threaded on upper end In this manner I avoid the necessity of havin 0f the Valve Stem nd r ting against the iljitwo operating handles or mechanisms and P Surface offlle 0011a! further avoid complicated structures and oplow ash r 20, as more clearly shown erations which might make the pperation of in F gthe Valve stem 13 cylindrical 317214 the valv nc rt i d difli lt, and receives with a free turnmg fit, asleeve My invention, will best .be understood by the Q end f whi h lsexternally reference td the accompanying drawings threaded and engages s milar threads in a showing apreferred embodiment thereof in boss 23 extendlng p from a y k which v 1 hows my valve c9nstruqti n .paf, bonnet IOWel' end 0f the bonnet is tially invertical, central, sectional view trans- Provided with a flange 27 ecured by suitable versely of the flow Y path through the valve, bolts to a flange 28 of the body 10. g

and. partially in front elevation, with the The valve stem 15" is preferably threaded valve member in its closed position, below the sleeve 22 as indicated at 29, to re' Fig.2 is "a vertical, central, sectional view ceive asimilarly threaded stop arm 30 carryto an enlarged scale of the lower portion of .ing at its ends threaded sto studs 31 and 32 Y the valve structure with the valve member in. for engagement with one o the pillars 25, 25

' end of the valve stem,

stem 15 in extends with slight clearance to limit the turning movement of the valve stem 15 in opening and closing the valve, the stop arm 30 being rigidly secured to the valve desired adjustment by means of a pin 33.

As a result of the construction described, angular movement of the arm 18 turns the valve stem and valve member to open'an close the valve, andangular movement of the sleeve 22 relatively to the yoke 24 raises and lowers the sleeve to raise the valve member from its seat and press the valve member against its seat respectively. The sleeve 22 from the'lower face of the washer 20 to the upper face of the stop arm 30, as a result of which upward movement of the sleeve to raise the valve member exerts an upward thrust on the washer 20 which is communicated to the collar 17 and thus to the nut 21 carried by the upper and downward movement of the sleeve 22 presses against the upper face of the stop arm 30 and produces a downward thrust on the valve stem and valve member which presses the valve member tightly against its seat.

Above the boss 23, the with a flat sided flange 34, to facilitate assembling the parts, above which the sleeve is cylindrical to receive a sleeve arm which sleeve 22 is provided is rigidly keyed to the sleeve as indicated at The forked end of the member 36, the upper surface of the sleevearm being preferably slightly below the upper end 0 the sleeve 22. The arm 35 is provided with an upwardly extending lug 37 in the path of the outer end of the stem arm 18, and is radially slotted as shown at 38 to receive a pin 39 which also extends through the forked end ofa second member 40 of the handle mechanism. The member yond its forked portion and-internally threaded as indicated at 41 to receive the threaded end of a rod 42 which may be of any convenient length to operate the mechanism. 40 carries an upwardly extending lug 43 which, when the pin 39 is at the inner end of the slot 38, is in P v the path of the stem arm 18, but when the pin tion with a stufling box 47 39 is1at the outer endof said slot, clears the outer end of the stem arm 18. The operatin position of the rod 42 is horizontal and witii the pin 39 at the inner or outer end of the slot 38 depending upon the operation to be effected, the pin 39 at the same time permitting the rod 42 to rest adjacent the body 10, when it is not desired to operate the valve mechanism.

The sleeve 22 is preferably counterbored between its ends as shown at 44 and provided with a plurality of small ports 45 in line with an oiling or greasing fitting 46 carried by the yoke boss 23, so that the threads on the sleeve 22 as well as its bore may be lubricated as desired.

The bonnet 26 is provided in its upper porterminated at its projection .53 to leave a 40 is extended be of the valve body,

lower end by a metal ring 48 supported on a shoulder in the bore of the bonnet, and below the ring 48, the bonnet bore is continued to form a condensation chamber 49 above the art of the bore in the bonnet engaging the valve stem 15. Below the bonnet 26, the body 10 contains a second condensation chamber d 50, the chambers 49 and 50 being effective in separating the stuffing box 47 from the zone of high temperature of the working fluid, due to the radiation effected b the valve body and by the lowerportion o the bonnet. The chamber 49' is provided with a port 51 closed by a screw plug 52 so that the condition of thechamber 49 as to fiuid pressure, may be tested when the valve member is in its tightly-seated position, should it be desired to repack the stuffing box when the valve is in use. In the event the valve member 14 is not tightly against its seat, and fluid under high pressure is being controlled, the fluid will find its way into the chamber 50 and in turn into the chamber 49 and be in evidence when the plug 52 is removed, indicating that the valve member is not tightly on its sea and that it must be more firmly seated before the repacking of the stufling box is begun.

The lower end of the valve member 14 is extended into a cylindrical portion 53 of reduced diameter,which has a turning fit in a corresponding bore in the lower part of the body 10, to form a bearing for the valve f member 14 when it is raised from its seat.

The body 10 is formed to leave 14 and the adjacent portion of the body 10, the latter being extended below the cylindrical chamber 55 which-is screwed on the lower end a screw plug 57 being providedin the cap 56 to drain the chamber 55 and to test the same for leakage around the lower part of the valve member.

As shown in Fig. 5, the valve member 14 is provided with a first port 58 connecting the chambers 50 and 54, andalso with a second ort 59 connecting the chambers 54 and 55, these ports being separate from and out of communication with the passageway for fluid flow through the valve member In this manner the chambers 50, 54 and 55 are maintained at the same pressure'and there is practically no resultant pressure tending to lift the valve closed by a cap 56 member from its seat or force it to its seat a chamber 54' between the lower end of the valve member lSU 1s in its open may be moved without turning movement of the valve stem and valve member 14, the valve member is pressed tightly against its seat; and in position B, the valve member position and raised from its seat to permit .free movement of the valve member to its closed position. Assuming that no turning of the valve member. Continued '43'into the movement in the same direction of the handle mechanism, moves the lug 37 against'the stem arm 18, so that during this continued movement the valve stem 15 and valve member 14 are moved with the handle mechanism from osition C to position B, thus opening the va ve member, but as yet leaving the valve member in its raised position slightl above its valve seat. Without changing t e-relation of the parts of the handle mechanism, the handle mechanism is now moved back from position B, through position C to position A, which leaves the stem arm 18 in position B since the handle lug 43 .is out of the path of the end of the stem arm 18, and the turning movement imparted to the sleeve 22, presses the valve member '14 tightly against its seat in the body 10.. When it is desired to move the valve member from its open position to its closed position, the handle mechanism is first placed in horizontal position with the rod 42 as valve stem as possible, and the handle mech- .anismis moved from position A through position C to position By this movement serving to lift the valve member from its seat but as et effecting no turning movement of the va' ve member. When the handle mechanism has reached position B, the rod 42' is moved towards the valve stem as far as it will go, which brings 'the'handle lug path of the stem arm 18 ;,the handle mechanism is then moved from. osition B to position C carrying with. it t e stem arm 18, thestem 15 and the valve member 14 valve which as yet is raised from its seat. Continued movement of the valve stem is'prevented by the stop 31,

and to press the valve member tightly against its seat, the rod 42 is moved outwardly as seat,

far as item go and the handle mechanism is moved from position to position A, which tightly. pressesthevalve member against its position for the handlemechanism, whether the valve is 0 en or, closed, and in its normal position, t e handlerod may turn on the valve, the handle rod 42 is far from the Position A is therefore the normal pin 39, adjacent the bod minimum of space. In t eration of the mechanism 10, and occupy a is manner, the opis simple, the opwhether the valve is open or closed due to the position of the pointer 19, and the movementof the handle mechanism to its inner or outer position radially is indicated at once by the inter-engaging parts which are in plain view of the operator. Furthermore, however the mechanism may the valve member cannot be moved beyond its open or closed position on accountof the stop 32 or 31 engaging one of the pillars 25, and since there is only one manner in which the handle mechanism can be operated to leave the stem arm 18 and pointer 19 either in. i

open or closed position, confusion in oper-' ating the mechanism is impossible, having in mind thatthe position of rest of the handle mechanism is in every case position A. It will further be observed that there is no stop mechanism limiting the movement of the handle mechanism-to position A, and that therefore this movement is continued until the valve member is tightly pressed against 1ts seat, which permits a certain amount of change in the position of rest of the handle mechanism as conditions nayrequire- While I have shown in invention in the particular embodimentab o will be understood that I do equivalents known to the art at the time of the filing of this application without departing from the scope of the appended claims. WhatIclaimis:' 1. In a plug valve construction, the combination of a body having a tapered seat, a similarly tapered plug for engaging said seat and movable angularly to open and closed positions, a bonnet carried by'said body,"a yoke carried by and spaced from said bonnet, a stem extending from said plug through said bonnet and said yoke, a sleeve mounted for turning movement on said stem and having threaded engagement with said yoke, a stop arm on said stem between ,said bonnet and said yoke, a stem arm secured to said stem outside of said sleeve, said sleeve extending substantially from said stop arm'to said stem arm, an operating arm secured to and extending from said sleeve, and a handle connected with'said sleeve arm to turn said sleeve, whereby angular movement of said handle around the axis of said stern moves said stem axially relatively to plug from and towards its seat as desired, said sleeve arm having a lug extending to engage said .stem p turning" movement'of said handle, and said handle having .a lug extending to engage said stem arm for the other direction of its turn- ,ing movement.

be operated,

arm for one direction of erator'always has a positive indication of i ve described, it not limit myself to this exact construction as I may employ said body to move said I carried by stem extending 1 ing from said sleeve,

bination of a body having a tapered seat, a similarly tapered plug and movable angularly to open and closed positions, a bonnet carried by said'body, a yoke and spaced from said bonnet, a

bonnet and said yoke, a sleeve mounted for turning movement on said stem and having threaded engagement with said yoke, a stop arm on said stem between said bonnet and said yoke, a stem arm secured to said stem outside of said sleeve, said sleeve extending substantially from said stop arm to said stem arm, an operating arm secured to and extendand a handle connected with said sleeve arm, to turn said sleeve, whereby angular movement of said handle around the axis of said stem moves said stem axially relativelyto said body to move said plug from and towards its seat as desired, said sleeve arm having a lug extending to engage said stem arm for one direction of turning movement of said handle, and said handle having :1 lug extending to engage said stem arm for the other direction of its turning movement, said handle connection providing for radial movement of saidhandle establishing'a (path of travel of said handle lug clear of sai stem arm. k

3. In a plug valve construction, the combination of a body having a tapered seat, a similarly tapered plug for engaging said seat and movable angularly to open and closed positions, a bonnet carried by said body, a yoke carried by and spaced from said bonnet, a stem extending from said plug through said bonnet and said yoke, asleeve mounted for turning movement on said stem and having threaded engagement with said yoke, a stop arm on said stem between said bonnet and said yoke, a stem arm secured to said stem outside of said sleeve, said sleeve extending substantially from said stop arm to said stem arm, an operating arm secured to and extending from said sleeve, and a handle connected with said sleeve arm to turn said sleeve, whereby angular movement of said handle around the axis of said stem moves said stem axially relatively to. said body to move said plug from and towards its seat as desired, said sleeve arm having a lug extending to engage said stem arm for one direction of turning movement of said handle,

and said handle having a lug extending to engage said stem arm for the other direction of its turning movement, said sleeve arm havmg a radial slot therethrough, andsaid handle connection comprising a pin extending through said handle and said slot.

4. In a plug valve construction,'the combination of a body having a tapered seat, a similarly tapered plug for engaging said seat and movable ang-ularly toopen and closed positions, a bonnet carried b said body, a yoke carried by and space from for engaging said seat from said plug through said stem outside of said sleeve,

said bonnet, a stem extending from said lug through said bonnet and said yoke, a s eeve mounted for turning movement on said stem and having threadedengagement with said yoke, a stop arm on said stem between said bonnet and said yoke, a stem arm secured to said stem outside of said sleeve, said sleeve extending substantially from said stop arm to said stem arm, an operating arm secured to and extending from said sleeve, and a handle connected with said. sleeve arm to turn said sleeve, whereby angular movement of said handle around the axis of said stem moves said stem axially relatively tosaid body to move said plug from and towards its seat as desired, said sleeve arm having a lag extending to engage said stem arm for one di rection of turningmovement of said handle and said handle having a lug extending to engage said stem arm for tion of its turning movement, said sleevearm having a radial slot said handle connection comprising a pivot pin extending through said handle and said slotv and providing for turning movement said handle on said pin to rest adjacent said body when not in use.

p 5. In a plug valve construction, the combination of a body having a tapered seat',"a similarly tapered plug for engaging said seat and movable angularly to positions, a bonnet carried by said body, a yoke carried by and spaced from said bonnet, a stem extending from said plug through said bonnet and said yoke, a sleeve mounte for turning movement on said stem and having threaded engagement with said yoke, a stop arm on said stem between said bonnet and said yoke, a stem arm secured to said said sleeve extending substantially from said stop arm to said stem arm, an operating arm secured to and extending from said sleeve, and a handle connected with said sleeve arm sleeve, whereby angular movement of said handle around the axis of said stem moves said stem axially relatively to said body to move said plug from and towards its seat as desired, said sleeve arm having a lug extending to engage said stem arm'for" one direction of turning movement of said handle,

and said handle having a lug extending to engage said stem arm for the other direction;

the other direcopen and closed -ioo to turn said body, a yoke carried by and spaced from said bonnet, a stem extending from said plugthrough said bonnet and said yoke, a sleeve mounted for turning movement on said stem and having threaded engagement with said yoke, a stop arm on said stem betwe'en'said bonnet and said yoke, astem arm secured to said stem outside of said sleeve, said sleeve extending substantially from said stop arm to said stem arm, an op erating arm secured to and extending from said sleeve, and a handle uonnectedwith said sleeve arm to turn said sleeve, whereby angular movement of said handle around the axis of said stem.moves said stem axially relatively to said body ,to move said plug from and towards its seat asdesired, said sleeve, arm having a lug extending to engage said stem arm for one direction of turning movement of said handle, and said handle having ,a lug extending;

, said stem arm for the other' dire'ction of its vidingfor turning bination of of said sleeve arm,

bination of turning movement,said sleeve arm having a radial slot therethrough, and said handle connection comprising a fork extending from the end of said handle on opposite sides and a pivot pin extending through said fork and saidslot and promovement of said handle on said pin. to-rest adjacent said body when not in use.- p

7. In a plug valve construction, the comhaving a tapered plug a plug movable angularly to control -fl u1d flow through said body and movable axiallyfrom and towards said seat, a handle movable radially relatively to and angularly around the axis ofsaid plug,and co-operating members between said handle and said plug for eifecting both angular and axial to engage 5 seat,'a plu movable angularly-to control fluid flow t rough said body and movable towards said seat, a handle relatively to and angularly around the axis of said plug, and coaxially fromand goperating members between said handle and said plug for effecting both angular and axial movement of said movement of said handle in one direction and axial movement of said plug by reversed an gular movement of said handle.

11, In a plug valve construction, the combination of a seat, a plug movable angularly to control fluid flow through said body and -movable axially from and towards said seat, a hanmovement "imparting angular'movement to saidplug with said plug lifted fromsaid seat.

12. In a lug valve construction, the combination ofa' ody having a tapered plug seat, a plu movable angularly to control fluid flow tILrough said body and movable axially from and towards said seat, a handle movable radiallyrelatively to and angu 'larly around the axis of said plug, and cooperating members between said handle and said plug for effecting both angular and axial movement of said plug by angular of said handle, said members inmovement of said plug by angular move-r cluding selectively engaging elements, the

ment of said handle. V 8. In "a,plug valve construction,the combination of a body seatfia plug movable movement of said plug b movement of said handle.

9 In a plug-valve construction, the coma body having a tapered plug seat, a plug movable angularly to control fluid flow through said body and movable movable radially relatively to and angularly around the axis of said plug, and co-operk atin'g members between said handle and said plug for efl'ecting both angular and axial movement of said plug by angular movement of said handle in either direction.

10. In a plugvalve construction, the coma body havlng'a tapered plug selection being controlled by said radial movement of said handle.

13. In a plug .valve construction, the com bination of a body having a tapered plug seat, a plug movable angularly to control fluid flow through said body and movable axially from and towards said seat, a handle movable radially relatively to and angularly around the axis of said plug, and 00- operating members between said handle and said plug for effecting both angular and axial movement of said plug by angular movement of said handle, the total angle of movement of said handle including a first angle of movement lifting said plug from said seat and pressing it against said seat as desired and a second angle of mmrement imparting angular movement to said plug with. said plug lifted from said seat, said members in= eluding selectively engaging elements, the selection :being controlled by said radial movement ,of said handle; i 14. In a lug. valve construction, the combination of seat, a plug movable angularly to control plug by angular I body having a tapered plug fluid flow through said body and movable 15. In a Plug valve construction, the combination 0 a body having a tapered plug seat, a plug movable angularly to contro fluid-flow through said body and movable axially from and towards said seat, a handle movable radially relatively to and angularly around the axis of said plug, a stem extending from said plug, a threaded leeve for imparting said axial movementfto said plug and connected with said handle, first members carried by said sleeve and said stem impartin angular movement in a first direction to said plug for angular movement in a first direction of said handle, a second member carried .by said handle for selective engagement with said stem member by said radial move- I I end of said plug,

ment of said handle imparting when engaged angular movementin a reverse direction to said plug for angular movement in a reverse direction of said handle, the axial movement of said plu freeing it from and pressing it against sai seat being independent'of angular movement of said plug.

16. In a plug valve, the combination of a body having a tapered plug seat, a tapered plug having a passageway for fluid flow therethrough, and astem extending from one said plug having a cylindric'al bearing extension at its other end, said body having a bore engaging said cylindrical extension and containing a first compartment around said stem and adjacent one end of said lu a second compartment around said cyin ricalextension and adjacent the other end of said plug, and a third compartment at the end of said cylindrical'extension, said plug having a firstrequalizing passageway inde- I independent pendent of said fluid passageway and connecting said first and said second compartments, and a second equalizing passageway off said fluid passageway and 7 connecting, said second and said third com- 1 around said stem an 5 plug havin partments.

17. In a plug valve,'the combination of a body having a tapered plug seat, a tapered a passageway for fluid flow therethroug a stem extending from one end of said plug, said plug having a cylindrical bearing extension at its other end, said body having a bore engaging said cylindrical extension and containm a first compartment adjacent one. end of said plug, a second compartment around said cylindrical extension and adjacent the other end of said plug, and a third compartment at the end'of said cylindrical extension, said plug having a first equalizingpassageway ndependent of said fluid passagewa and connecting said first and said secon compartments, and a second equalizing passageway independent of said fluid passageway and connecting said second and said third compartments, a screw cap engaging said body and closin said third compartment, and means for raining said third compartment.

In witness whereof, I hereunto subscribe my name this 14th %;y of October, A. D. 1930.

ALTER W, MOHR.

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